<template>
  <div class="cart-sku" ref="target">
    <div class="attrs" @click="toggle">
      <span class="ellipsis">{{ attrsText }}</span>
      <i class="iconfont icon-angle-down"></i>
    </div>
    <div class="layer" v-if="visible">
      <div class="loading" v-if="loading"></div>
      <GoodsSku
        v-else
        :goodsData="goodsData"
        :skuId="skuId"
        @change="changeSku"
      />
      <XtxButton
        type="primary"
        size="mini"
        style="margin-left: 60px"
        @click="confirm"
        >确认</XtxButton
      >
    </div>
  </div>
</template>
<script>
import { ref } from 'vue'
import { onClickOutside } from '@vueuse/core'
import { getSpecsAndSkus } from '@/api/goods'
export default {
  name: 'CartSku',
  props: {
    attrsText: {
      type: String,
      default: ''
    },
    skuId: {
      type: String,
      default: ''
    }
  },
  setup (props, { emit }) {
    // 控制面板的显示隐藏
    const visible = ref(false)
    const loading = ref(false)
    const goodsData = ref(null)

    const open = () => {
      loading.value = true
      visible.value = true
      // 面板打开发送请求，获取信息
      getSpecsAndSkus(props.skuId).then(data => {
        loading.value = false
        goodsData.value = data.result
      })
    }
    const close = () => {
      visible.value = false
    }
    const toggle = () => {
      visible.value ? close() : open()
    }

    const target = ref(null)
    onClickOutside(target, () => {
      close()
    })

    const newSku = ref(null)
    const changeSku = (sku) => {
      // 保存传递出来选中的sku
      newSku.value = sku
    }

    // 用户点击了确定
    const confirm = () => {
      // 判断是否选中了全部的规格
      if (!newSku.value.skuId || newSku.value.skuId === props.skuId) {
        return
      }
      // 通知父组件用户确认了修改
      emit('change', newSku)
      // 关闭弹层
      close()
    }
    return { visible, toggle, target, goodsData, loading, changeSku, confirm }
  }
}
</script>
<style scoped lang="less">
.cart-sku {
  height: 28px;
  border: 1px solid #f5f5f5;
  padding: 0 6px;
  position: relative;
  margin-top: 10px;
  display: inline-block;
  .attrs {
    line-height: 24px;
    display: flex;
    cursor: pointer;
    span {
      max-width: 230px;
      font-size: 14px;
      color: #999;
    }
    i {
      margin-left: 5px;
      font-size: 14px;
    }
  }
  .layer {
    position: absolute;
    left: -1px;
    top: 40px;
    z-index: 10;
    width: 400px;
    border: 1px solid @xtxColor;
    box-shadow: 2px 2px 4px lighten(@xtxColor, 50%);
    background: #fff;
    border-radius: 4px;
    font-size: 14px;
    padding: 20px;
    &::before {
      content: "";
      width: 12px;
      height: 12px;
      border-left: 1px solid @xtxColor;
      border-top: 1px solid @xtxColor;
      position: absolute;
      left: 12px;
      top: -8px;
      background: #fff;
      transform: scale(0.8, 1) rotate(45deg);
    }
    .loading {
      height: 224px;
      background: url("~@/assets/images/loading.gif") no-repeat center;
    }
  }
}
</style>
